Batter-board.



R. H. PEGK.

Patented Mar. 9, 1915.

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ATTO EY.

UNI AT s PATENT. ,Q

RUSSELL H. PEGK, or PALMERTDN, PENNSYLVANIA.

BATTER-BOARD.

To all whom it may concern. I

Be it known that I, RUSSELL H. PEOK, a citizen. of the United States, residing at Palmerton, county of Carbon, State of Pennsylvania, have invented certain new and useful Improvements in Batter-Boards, of which the followingis a specification. Thisinvention relates tobatter boards and particularly to a clamp for 'adjustably setting up the batter board to any height or span relative to an excavation. Heretofore such batters as have been in use have consisted simply of a board nailed'to the guide posts. The disadvantage of that construction lay in the fact that the batter board could not be adjusted and could nottherefore be used again so that the material became waste stock after its initial use. To

the end therefore of providing a batter,

board which will be adjustable both as to height and to span to adapt it to any level I have devised my present invention. In it, I adj ustably clamp the board flatwise near each end to the guide posts so that the board may be adjusted both vertically and horizontally.

The construction and operation of my invention will be more fully disclosed in the specification that follows.

In the drawings forming a part of that specification I have shown as an illustrative embodiment a form of batter board and clamp which have been found satisfactory and efiicient in use.

Throughout specification and drawings like reference numerals are correspondingly applied, and in these drawings Figure 1 is a view' showing one application of my batter board. Fig. 2 is a section of one of the clamps and tightening levers therefor taken on the line 2-2 of Fig. 1,1 ig. 3 is a section on the line 3-3, Fig. 2, and Figs. 4. and 5 are details of the removable handle.

In the embodiment selected as an illustration I have shown a batter board 1 in its application to an excavation 2. The batter board is adjustably set up on guide posts 3, driven solid into the ground on each side of the excavation, by clamps of special construction. Each clamp consists of a spring plate a to which is riveted or otherwise fastened near each end, the flange 5 of a clamping arm 6. Each arm 6 has its free end formed as a hook 7 adapted to be engaged over the rod 3 in spaced relation to the hook of the cooperating arm of the Specification of Letters Patent.

clamp. Each pair of arms 6 defines an open ended support in which one endg'of the batter means of a'pair of tightening 'levers 8 re-' movably: dovetailed in elliptical cams 9 at their inner ends. mally disposed so tween one side of thebatter boardan'd the wise levels 8 until thehighest points'of their cams 9 engage the boardand further move-- ment' of the levers is impossible. "When thiscondition is reached the board is firmly clamped atboth its ends against the posts and can not be disengaged untilthe levers are'released. Thespring plates 4 yield outwardly slightly to permit the cams .to turn. The resiliency of the plates is preferably suchas to permit the levers to be tightened and released by a partial swing in either direction. This permits the board to be clamped to a new position irrespective of whether or not the levers were returned to their original position before the board was released. In practice I havefound that'the friction ordinarily developed between the cams and the side of the board is sufficient to hold the levers in tightened position. Obviously, however, a positive lock for the levers when in their tightened position could;

clamped by tightening the levers 8. The ad-' justment of the board for height and for span is had without removing the board from its clamps by releasing the levers and sliding the board and clamps up or down on the posts 8, if an adjustment for height is desired, and by sliding the board transversely in the clamps without moving the clamps, if an adjustment for span is required, until the proper level is established.

While I have shown and described my invention in its application to the field of engineering, it is understood that I do not limit myself'to this or any other application but reserve the right to use the invention in any capacity where it would perform the functions intended. V

V -Patented Mar. 9,1915. V Application filed July 7, 1914. Serial No. 849,484.

board is 'adaptedxto be inserted I and clamped. The clamping is effected by Each cam lever isnoras to bring its 'camf9 be-- spring plate 4. The board is clampeafiaa against the posts .by swinging the cam resorted to Within the limits of the appended claims.

What I therefore claim and desire to secure by Letters Patent is:

1. A clamp for adjustably. clamping a batterboard to its guide post to permit vertical and horizontal adjustment of said. board relative to said post, comprising a spring plate vertically disposed and having a'pair of spaced clamping arms hooked over sa d post, and a tightening lever having a cam end engaging said spring plate and spacing said platei'rom said board -ltortightening said clamp. ,2. A clamp tor adjustably clamping a batter board to. its guide post to permit vertical L and. horizontal adjustment of said board relative to said post, comprising a spring platevertically disposed and having a pair of horizontally disposed spaced clamping arms hooked over said post, and a copies at. this patent may be obtained for five cents eaclaby addressing the- WaIhIngtom-EG.

cam lever operable by a partial swing .in either direction for tightening said *clamp.

3. In a device for setting grades in combination, a batter boardyincompressible guide posts therefor, a pair of clamps adjustably.

engaging said board and posts, and tightem ing members engaging said clamps and said board for clamping said board flatly against said posts.

bination, lindrical guide posts. therefor, prising a pair of board flatly against said posts.

In testimony whereof I afiix my signature in presence of two Witnesses. g

RUSSELL H1. PEOK.1

Witnesses:

LE ROY D. -KEMMERER, EDWARD F. Han'rznnr...

Commissioner of Patents.- 

